How old is the toshiba? If it's not too old then Toshiba may have a firmware update for it. You'll have to check their website and follow the instructions on how to flash the firmware. As I said above getting a normal, modern DVD-R should be ok, they just don't say 'Vista friendly' or whatever. If I had more time I'd recommend something but I've got to go... Good luck.

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AMD X2 BLACK EDITION 3.2GHz SAMURAI COOLER::GA-M51 MB-HEATPIPE CHIPSET COOLER::3GB XMS2 PC6400 RAM::GEFORCE 8800 GTS 320MB 575/900MHz::160GB BARRACUDA RAID 0::SOUNDBLASTER AUDIGY::SAMSUNG WRITEMASTER DVD-RW/PIONEER DVD::HIPER MODULAR 530W PSU::THERMALTAKE ARMOUR Jr CASE::RAZER COPPERHEAD MOUSE::VISTA HOME PREMIUM SP1